Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec87fd465e7d5fbd…

MALICIOUS

PDF

74.6 KB Created: 2021-04-01 03:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6c4afe4352062e74fe85e62fb777e741 SHA-1: 59bf5d8efc90fba3914895df8d5109fb548449b6 SHA-256: ec87fd465e7d5fbdea4a84365050afbc096f982f474bc4a8d06161eecb1bb640
144 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a LOLBin command-execution lure. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gimoguvi.ru/award?keyword=alkyl+halides+iit+jee+notes+pdf PDF link annotation
    • http://sosed.market/jumurovejikezujazodn9inh.pdfIn PDF document text
    • http://karnaval.host/angel_care_home_health_services_las_vegas_nvcem1e.pdfIn PDF document text
    • http://maxist.ru/79649315252lqwzx.pdfIn PDF document text
    • http://detonicufficiale.website/634215465545mh8s.pdfIn PDF document text
    • http://santand-es.com/rozopulokujxyxg1.pdfIn PDF document text
    • http://mumadefiku.iblogger.org/xufifebefudiwulonepasaja.pdfIn PDF document text
    • http://deutschebank-meine.com/tunalatig1ooha.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dosipive/reporting_minor_car_accident_ontario.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/2006_honda_civic_ex_sedan_wiper_blade_size.pdfIn PDF document text
    • http://navipulazem.epizy.com/blockchain_python_book.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/dafuwivolefuvazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a67e71ee-5a34-4ab7-9ab6-c64956d9c6c1/oracle_sql_date_format_function.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/87607323101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8deb3d60-fdfb-463c-9bc2-093b890a9524/what_do_vibrant_dreams_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/que_es_una_imagen_tumblr.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/arithmetic_worksheets_ks1.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/answering_service_care_margate_fl.pdfIn PDF document text
    • http://konojutusaxevik.rf.gd/83393531601.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/phone_call_answered_on_another_device.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/new_cholesterol_guidelines_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43407e19-195c-4193-b633-9f66704e9bdd/what_age_is_eragon_book_appropriate_for.pdfIn PDF document text
    • http://vuwejamadadodi.epizy.com/death_stranding_legend_of_legends_trophy_guide.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A7 5264 bytes
SHA-256: 67562b9ee52b1b554efdb5f417ca4282f8fce7397c6b877c90b5a737588cb9a3
font_01_sfnt_off0000f79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79F 10928 bytes
SHA-256: 1cee1a856db09310132211cce4c8ef95c6a88b8a45a11afea484d670eab6c4f5

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